0.3 mm eccentric bearings

Millimetre-precise axle height adjustment: NSR 0.3 mm eccentric bearings

Eccentric bearings are one of the most valued resources by slot car tuners when working on the fine-tuning of a chassis. The 0.3 mm eccentricity of these NSR bearings (ref. NSR4873) allows for controlled modification of the rear axle height relative to the chassis, directly influencing aerodynamic load, tyre contact with the track, and the overall behaviour of the car in corners.

Function and performance

By rotating the eccentric bearing in its housing, the centre of the axle shifts slightly relative to the centre of the bearing. In this case, that displacement is 0.3 mm, allowing for precise raising or lowering of the rear axle. It is an effective way to adjust the car's ride height and optimise grip without the need to replace the chassis or modify structural parts.

• Eccentricity: 0.3 mm
• Brand: NSR
• Reference: NSR4873

Compatibility and installation

These bearings are designed for NSR chassis compatible with this adjustment system. Before installing them, it is advisable to check that the chassis housing accepts eccentric bearings and that the inner diameter corresponds to that of the axle to be used. Installation is straightforward but requires attention: the orientation of the bearing determines the direction of the adjustment, so it is recommended to conduct track tests after each variation to assess the result.

Installation and preparation

To make the most of these eccentric bearings, it is advisable to work systematically: adjust, test, and note. Small variations in axle height can translate into noticeable changes in grip and cornering stability. Combining different eccentricities (NSR offers several options in its spare parts catalogue) allows for finding the ideal balance for each type of track and lane.

Ideal for…

This component is designed for enthusiasts and competitors looking to take their slot car setup beyond standard assembly. If you participate in club championships or simply enjoy optimising every detail of the chassis, NSR eccentric bearings are a tuning resource worth having in your workshop drawer.

Common mistakes

• Not checking the axle diameter: ensure that the bearing is compatible with the axle you are mounting on your chassis.
• Ignoring the orientation: the angular position of the bearing determines whether the axle goes up or down. Mark the initial position before adjusting.
• Not testing on track after adjustment: the actual effect of the eccentricity depends on the weight of the car, the type of tyre, and the characteristics of the lane.

Frequently asked questions

What is the difference between a standard bearing and an eccentric one?

A standard bearing has the inner hole centred relative to the outer one, so the axle remains at the same height. The eccentric bearing has the hole offset, allowing for variation in the axle position by rotating the bearing in its housing.

How much does the axle height vary with 0.3 mm of eccentricity?

The maximum displacement of the axle is 0.3 mm from the central position. Depending on the orientation of the bearing, the axle can rise or fall that amount, which can make a noticeable difference in the car's behaviour on track.

Are these bearings compatible with all NSR chassis?

Not all NSR chassis accept eccentric bearings. Check your chassis documentation or contact us to confirm compatibility before placing your order.

Can they be combined with bearings of different eccentricity on the same axle?

Technically it is possible, but it is not common practice. The usual approach is to use the same eccentricity on both sides of the axle to maintain correct alignment. If you are looking for asymmetrical effects, it is advisable to do so with knowledge and always testing on track.

How many units does the NSR4873 pack include?

The manufacturer's information for this reference does not specify the number of units per pack in the available information. We recommend contacting us directly if you need to confirm this before your order.

NSR4873 eccentric bearings 0.3 mm — precision slot car setup component by NSR. Designed for fine-tuning rear axle height on compatible NSR chassis, these eccentric bearings allow controlled adjustments that directly affect car handling, tyre contact and cornering performance. A must-have tuning part for club racers and dedicated slot car enthusiasts looking to extract every tenth of a second from their build.